1. Department of Emergency, Xuanwu Hospital, Beijing Institute for Brain Disorders Capital Medical University Beijing China
2. Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital Capital Medical University Beijing China
3. Department of Neurology, Xuanwu Hospital Capital Medical University Beijing China
4. Department of Neurosurgery Wayne State University School of Medicine Detroit MI USA
5. Department of Neurosurgery, Xuanwu Hospital Capital Medical University Beijing China